Ефекти рада комбајна zmaj 142 RM и John deere 2264 при жетви пшенице агроеколошким условима Cрема

Introduction of high productive combines in harvest technology process, is represented by point of quality loss of harvested grains. In the paper are comparatively showed data of investigations of two wheat combines types. The effects and losses of wheat grains have been underlined, in dependence on adjusted parameters. The achieved results have been analyzed and expertise has been done.Увођење високопродуктивних комбајна у технолошки процес жетве, има може свега са аспекта губитака и квалитета овршеног зрна. У овом раду су компаративно приказани подаци испитивања два типа житних комбајна. Акценат је на ефектима, односно губицима зрна пшенице, у зависности од подешених параметара,при чему се анализирају добијени резултати и даје стручно мишљење

Primena gravitacionog stola u doradi semenske lucerke

Processing alfalfa seed from natural sources with admixture, grains of other species and various impurities are removed and clear grain of the basic culture is obtained. Grain of the basic culture is prepared for sowing machine and quality planting, germination and sprouting. Alfalfa seed loses during the processing depend on quantity and type of weed and other impurities of organic and inorganic origin present in the naturalized seed. In this paper is given the analyses of the efficiency during natural alfalfa seed processing of two different purities (B1, B2), processed on the same equipment that involves gravity table Oliver - 240. As the relevant parameters that define the effects of alfalfa seed were: clear grain (%), weed and other cultures seed (%), inert matter (%), quantity of processed seed (kg), time of seed processing (h), active (kWh) and reactive (kVArh) current consumption, processing output (%), and seed loses (%).Procesom dorade semenske lucerke iz naturalnog semena sa primesama uklanjaju se sva zrna stranih primesa i razne nečistoće i izdvaja čisto zrno osnovne kulture koje se priprema u što povoljnije stanje za sejalicu i kvalitetnu setvu, klijanje i nicanje. Gubici semena lucerke u procesu dorade zavise od vrste i količine korova i ostalih nečistoća, organskog i neorganskog porekla prisutnih u naturalnom semenu. U radu je data analiza efikasnosti pri doradi naturalnog semena lucerke dve različite čistoće (B1, B2) dorađene na istom sistemu mašina za doradu u okviru koga je korišćen gravitacioni sto Oliver - 240. Kao relevantni parametri koji definišu efekte dorade semena lucerke bili su: čisto seme (%), seme korova i seme drugih kultura (%), inertne materije (%), količina dorađenog semena (kg), vreme dorade semena (h), utrošak aktivne električne energije (kWh) i reaktivne električne energije (kVArh), randman dorade (%) i gubici semena (%)

Утицај чистоће натуралног семена lуцерке на рандман дораде

To improve seed quality, harvested seed must be transported to processing facility. Harvested, naturalized alfalfa seed contains many different particles such as weed seed, seed of other raised plants ant inert matter. In the processing of small grained legumes, output is in direct dependence with percent of weed species and of quality of other particles in naturalized seed. High percent of purity of naturalized alfalfa seed is not always a guarantee for high processing output. It primary depends on species of present weed in naturalized seed. High purity seed with low percent of weed leads to high output. Weed usually makes processing more difficult and costly. In this study, was analyzed the effect of quantity of particles on utilization of alfalfa seed and two different kind of seed purity, that were processed on the same system of machine.У процесу дораде семена ситнозрних легуминоза висина рандмана семена директно зависи од заступљености коровских врста и осталих примеса у натуралном семену. Висок степен чистоће натуралног семена луцерке није увек гаранција и високог рандмана дораде, чак и при малом садржају корова, већ он првенствено зависи од врсте присутних корова у натуралном семену. Већи садржај штетних корова у натуралном семену луцерке са високом чистоћом смањује укупну количину дорађеног семена, отежава и поскупљује дораду. У раду је дата анализа утицаја садржаја примеса у натуралном семену луцерке, на искоришћење семена, односно добијену количину семена, при чему се дорада две различите чистоће семена обављала на истом систему машина за дораду

Enhancing predictive accuracy of the cardiac risk score in open abdominal aortic surgery: the role of left ventricular wall motion abnormalities

BackgroundOpen abdominal aortic surgery carries many potential complications, with cardiac adverse events being the most significant concern. The Vascular Study Group Cardiac Risk Index (VSG-CRI) is a commonly used tool for predicting severe cardiac complications and guiding clinical decision-making. However, despite the potential prognostic significance of left ventricular wall motion abnormalities (LVWMAs) and reduced LV ejection fraction (LVEF) for adverse outcomes, the VSG-CRI model has not accounted for them. Hence, the main objective of this study was to analyze the added value of LV wall motion on the discriminatory power of the modified VSG-CRI in predicting major postoperative cardiac complications.MethodsA prospective study was conducted involving 271 patients who underwent elective abdominal aortic surgery between 2019 and 2021. VSG-CRI scores were calculated, and preoperative transthoracic echocardiography was conducted for all patients. Subsequently, a modified version of the VSG-CRI, accounting for reduced LVEF and LVWMAs, was developed and incorporated into the dataset. The postoperative incidence of the composite endpoint of major adverse cardiac events (MACEs), including myocardial infarction, clinically relevant arrhythmias treated with medicaments or by cardioversion, or congestive heart failure, was assessed at discharge from the index hospitalization, with adjudicators blinded to events. The predictive accuracy of both the original and modified VSG-CRI was assessed using C-Statistics.ResultsIn total, 61 patients (22.5%) experienced MACEs. Among these patients, a significantly higher proportion had preoperative LVWMAs compared to those without (62.3% vs. 32.9%, p < 0.001). Multivariable regression analysis revealed the VSG-CRI [odds ratio (OR) 1.46, 95% confidence interval (CI) 1.21–1.77; p < 0.001] and LVWMA (OR 2.76; 95% CI 1.46–5.23; p = 0.002) as independent predictors of MACEs. Additionally, the modified VSG-CRI model demonstrated superior predictability compared to the baseline VSG-CRI model, suggesting an improved predictive performance for anticipating MACEs following abdominal aortic surgery [area under the curve (AUC) 0.74; 95% CI 0.68–0.81 vs. AUC 0.70; 95% CI 0.63–0.77; respectively].ConclusionThe findings of this study suggest that incorporating preoperative echocardiography can enhance the predictive accuracy of the VSG-CRI for predicting MACEs after open abdominal aortic surgery. Before its implementation in clinical settings, external validation is necessary to confirm the generalizability of this newly developed predictive model across different populations

Kvalitet rada separacionih organa pri kombajniranju pšenice kombajnima u agroekološkim uslovima srema

Content of untideness cuted and damaged grains in mass whole grain is undesiplagle in seeds, as well as in mechantile grains. In seed as well as in merchantile wheet, untideness difficulting separation are limitating factor, considering facts that with increases mass inflow, and withe untides, as well as losses of harvesting device. Many factors influence on separation device, as plant moisture, adjusting space drum-under drum with drum rotation, separation device, rotation number of ventilator, opens of vetilation valves. If relevant parameters are not adjusted it leads to the highest untides qunatities. The objective of our two year trials was to compare two combine types Zmaj 142RM and John Deer 2264 and to determine quality of grains while harvesting, and to show lacks and advantages of applied concept.Како у семенској роби, тако и у зрну за прераду садржај примеса, поломљеног и штурог зрна је непожељан. У семенској роби, као и роби за прераду, примесе отежавају чишћење и чување, као и квалитет добијеног производа. Органи за чишћење су ограничавајући фактор, имајући у виду чињеницу да се са повећањем брзине кретања повећава доток масе, а самим тим и садржај нечистоћа, као и губици вршалице. На квалитет рада органа за чишћење утиче већи број фактора: влага усева, усклађеност размака бубањ-подбубањ са бројем обртајa бубња, подешеност сита, број обртаја вентилатора, отвореност отвора за вентилацију. Уколико релевантни параметри нису усклађени добијају се највеће количине примеса. Циљ наших двогодишњих истраживања је био да се компаративним испитивањима два типа комбајна и то Zmaj 142RM и John Deer 2264 одреди квалитет овршреног зрна и укаже на недостатке, односно на предности примењене концепције

Rezultati poljsko-laboratorijskih ispitivanja kvaliteta rada nekih kombajna pri žetvi pšenice

Wheat harvesting today is being done in single phase, by using wheat combine with different technology scheme of harvesting device. For all of these common is single phase harvesting, with different work quality. Many factors influent on working quality, starting from plant condition, combine adjustments, defining of relevant parameters, condition and staff skills. If key parameters are not adjusted, quality of work is signifficantly decrease, with increase losses of harvested mass. The aim of this paper was to determine quality of work, by field-lab trials depending on parameters. Finaly based on achieved parameters, proove advantages and disadvantages of applied concept.Убирање пшенице данас се обавља једнофазно, применом жетвених комбајна са различитом технолошком шемом уређаја за вршидбу. За све је заједничко да се жетва обавља једнофазно, уз различит квалитет рада. На квалитет рада жетвених комбајна утиче већи број фактора, почев од стања усева, подешености комбајна, односно дефинисаности релевантних параметара, исправности, обучености руковаоца. Уколико релевантни параметри нису усклађени, онда се квалитет рада комбајна нарушава у значајној мери, чиме се повећавају губици и удео примеса у овршеној маси. Циљ истраживања био је да се пољско-лабораторијским испитивањима неких комбајна утврди квалитет рада, у зависности од релевантних параметара, те да се са основу добијених резултата укаже на предности, односно на недостатке примењене концепције

Rezultati eksploatacionih ispitivanja kombajna za ubiranje zrna sa oglednih polja

The collection of grain from trial fields are performed by the harvesters of different technological and technical solutions. The very process of collecting seeds is very complex and sensitive, and accompanied by the attributes that are not characteristic of mercantile harvesting grain. Therefore, the harvesting of grain from trial fields are given special attention in order to achieve optimal effects of applied combines and of obtaining more realistic results with the experimental fields. The aim is to show how the applied technology and technical solutions and the parameters affecting the quality of combine harvested crops of seed mass, as well as exploitation indicators combine.Убирање зрна са огледних поља изводи се комбајнима различитих технолошко техничких решења. Сам процес убирања зрна је веома сложен и осетљив, а праћен је специфичностима које нису карактеристичне за убирање меркантилног зрна. Због тога се убирању зрна са огледних поља посвећује посебна пажња у циљу остваривања оптималних ефеката рада примењених комбајна и добијања што реалнијих резултата. Циљ рада је да се прикаже како примењена технолошко-техничка решења и дефинисани параметри комбајна утичу на квалитет овршене масе семенских усева, као и на експлоатационе показатеље комбајна

Quality of Supply and Uncertainty: Risk and Reliability Implications from DERs and Hybrid Microgrids

Future networks will incorporate a combination of microgrids and different types of renewable-based distributed energy resources (DERs), allowing them to provide ancillary services in grid-connected mode and, if necessary, operate in an islanded mode to increase network proactivity, continuity of supply, reliability, and resilience. Also, energy storage has become a critical issue in microgrid and residential building applications due to varying limitations such as capacity-loss over time and aging. This panel covers all types of smart solutions that exploit microgrid optimisation under uncertainty, new probabilistic methods for managing microgrid energy management systems, including Hydrogen (H2) as one of the key energy vectors for long-term storage. A sub-topic considers innovative approaches to the analytical and simulation techniques for assessing the optimal operation and control of microgrids and DERs, while dispatching different ancillary services for the grid in a reliable and economical manner. The panel insight will also extend to self-optimizing control solutions of building microgrids for the integration in net-zero energy buildings, as well as electric mobility (vehicle-to-grid, V2G, or boat-to-grid, B2G) within maritime, island microgrids, or integrated port energy systems. The scope includes the predictive maintenance and fault detection capabilities in hybrid (grid-connected and islanded) microgrids to ensure a smooth operation and maximize self-consumption of renewable energy intermittency through predictive control, artificial intelligence, machine learning and/or novel forecasting techniques